Nut-lock washer



Patented Feb. 9, 1892.

D. 0. WARD.

NUT LOOK WASHER.

(No Model.)

d a a v v Linin -=3. 4 H122? UNITED STATES PATENT ()FFICE.

DANIEL O. VARD, OF NEXV A RK, NEXV JERSEY.

NUT-LOCK WASHER.

SPECIFICATION forming part of Letters Patent No.468,488, dated February 9, 1892.

Application filed October 17, 1891. Serial No. 409,060. (No model.) i

To all whom it may concern.-

Be it known that I, DANIEL O. WARD, a citizen of the United States, residing at Newark, in the county of Essex and State of New Jersey, haveinvented certain newand useful Improvements in Nut-Lock Vashers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference beinghad to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

The object of this invention is to provide a nut-lock which shall be more positive and effective in its operation as compared with many of those heretofore in use and to secure other advantages hereinafter referred to.

The invention consists in the improved nutlock andin the arrangement and combination of the several parts connected therewith, as herein set forth, and finally pointed out in the claims.

Referring to the accompanying drawings, in which similar letters of reference indicate corresponding parts in each of the several figures where they occur, Figure 1 represents in side elevation sections of abutting trackrails and a fish plate or anglebar secured thereto by bolts and nuts and showing my improved nut-lock in connection therewith; and Fig. 2 is a section through the line 00 of the same, the nut being screwed home. Fig. 3 represents in edge elevation the improved nut-1ock washer or ring in its normal condition or shape, and Fig. etis a plan view of the same. Fig. 5 represents in plan the inner face of the nut as it appears after it has been screwed home against the washer or ring.

Referring to said drawings, A indicates the trackrails; 13, the fish-plate or angle-bars;

O, the bolts; D, the nuts, and o my improved nut-lock washer or ring. The latter consists of a split ring of tempered spring-steel twisted out of plane in the ordinary manner to give resiliency thereto and having a series of teeth 6 formed on one or both faces near the outer edge or periphery thereof, as shown in Figs. 1,2, 3, and 4. Said teeth are preferably pyramidal in form, especially as to the three outer sides, while the inner side may be per= than that of the angle-bar, as it generally is,

or if not the teeth will be embedded in the nut and a groove be cut in the angle-bar or fish-plate. will be to greatly augment the holding-power or efficiency of the washer or nut-lock and prevent the nut from'turning backward and working loose, as will be obvious. Moreover, as the washer is designed to encircle the bolt loosely, so as to leave a little space between the inner surface of the former and the outer surface of the latter, the tendency of the nut to work loose may be still further checked or overcome or indeed be rendered impossible by slight displacement of the washer after the nut has been screwed home, which can be done with a smart blow with a hammer on the edge thereof, thereby changing the relative position of the teeth and the grooves, so that the former will be out of the path of the latter and will therefore abut against the sides of the nut in the event of any movement of the latter, instead of entering direct the grooves therein, as will be manifest, the result beingthat the'nut cannotbe turned backward without the application of a force sufli- In either case, however, the effect cient to enable the teeth to cut a new path or V Having thus described my invention, what I claim as new is-- 1. The improved nutlock washer herein described, consisting of a split ring of tempered spring-steel bent or twisted out of plane to give resiliency, the outer surface thereof being flat or plain except next to or near the periphery, Where it is provided with a series of teeth adapted to engage and cut a groove in the inner face of the nut, as described, and for the purposes set forth.

2. The improved nut-lock Washer consist- 111g of a split ring of tempered springsteel bent or twisted out of plane to give resiliency, the opposite faces thereof being flat or plain except next to or near the periphery, where they are provided with aseries of teeth adapted to'engage and cut a groove in the inner face of the nut and the outer face of the fishplate or angle-bar, as described, and for the purposes set forth.

3. The improved nut-lock washer consistingof a split ring of tempered spring-steel bent or twisted out of plane to give resiliency and capable of a lateral movement beneath the nut and provided on its face near the periphery With a series of teeth adapted to cut a groove in the face of the nut, as described, and for the purposes set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 12th day of October, 1891.

DANIEL O. ARD.

Witnesses:

OLIVER DRAKE, OSCAR A. MICHEL. 

